CN104050973A - Low power audio trigger via intermittent sampling - Google Patents
Low power audio trigger via intermittent sampling Download PDFInfo
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- CN104050973A CN104050973A CN201410096722.1A CN201410096722A CN104050973A CN 104050973 A CN104050973 A CN 104050973A CN 201410096722 A CN201410096722 A CN 201410096722A CN 104050973 A CN104050973 A CN 104050973A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/74—Details of telephonic subscriber devices with voice recognition means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Systems and methods may provide for using an audio front end of a mobile device to sampled audio from an audio signal during a first portion of a periodic detection window, and reducing a power consumption of one or more components of the audio front end during a second portion of the periodic detection window. Additionally, a determination may be made as to whether voice activity is present in the audio signal based at least in part on the sampled audio. In one example, the length of the first portion and the length of the second portion are defined by a duty cycle of the periodic detection window.
Description
Technical field
Embodiment relates generally to mobile device.More specifically, embodiment relates to and initiates mutual with mobile device with low-power speech trigger device.
The various advantages of embodiment are by by reading following instructions and the claim of enclosing and by reference to following figure, those skilled in that art being become obviously, wherein:
Fig. 1 is according to the block diagram of the example of the speech trigger device framework of embodiment;
Fig. 2 is for the start plot of example of duration of the speech trigger device accuracy vs. voice activity detector of multiple frame sign according to embodiment;
Fig. 3 is the process flow diagram with the example of the mutual method of mobile device according to embodiment initiation;
Fig. 4 is according to the block diagram of the example of the mobile device of embodiment.
Embodiment
Turn to now Fig. 1, low-power speech trigger device framework 24 is shown.This framework 24 is used in substantially (for example,, in the situation that user does not press button or touches mobile device by other mode) in hands-free setting and realizes the detection of starting with the interactive voice of mobile device.In illustrated example, audio front end 10 comprises microphone 12, modulus (A/D) converter 14, storer 16, voice activity detector (VAD) 18 and phrase recognizer 20.As discussed more in detail, the windows such as for example regular detection window can be by the power management module 22(for framework 24 for example, it comprises Power management logic) set up, wherein this regular detection window has dutycycle, its active part that limits regular detection window (for example, sample frame) and the regular inactive part (for example, abandoning frame) of detection window.Be noted that especially inactive part can realize the battery life that very large power is saved and extended to mobile device.
More specifically, regular detection window enliven part during, the sound signal that audio front end 10 can be used for catching from microphone 12 obtains sampled audio.Under these circumstances, A/D converter 14 can particular sample speed (for example, an x per second sample) obtain the sampled audio (for example, the voice data of N millisecond) for each active part/sample frame of regular detection window to sampled audio signal.
On the other hand, during the inactive part of regular detection window, audio front end 10 can be abandoned any sampling of sound signal and power management module 22 and can reduce the power consumption of one or more parts of audio front end 10.For example, during the inactive part of regular detection window, power management module 22 can, to microphone 12, A/D converter 14, voice activity detector 18 and/or 20 power-off of phrase recognizer, make storer 16 in self-refresh mode, etc.Thereby the sustainable odd number N of front end 10 millisecond ground, to sampled audio signal, then continues even number N millisecond ground " sleep " (during each regular detection window).Be noted that especially the power consumption of the parts of audio front end 10 during the inactive part that is reduced in regular detection window can obviously extend the battery life of mobile device.
In one example, consideration and power up the expense associated with power-down operation can and abandon the length of frame (, regularly the inactive part of detection window) in definite sample frame (, regularly detection window enliven part) time.For example, the length of sample frame (for example, sample frame length) be chosen as be greater than fully with any expense duration that powers up operative association of audio front end 10 in case guarantee energy save not by duty cycle method described herein institute invalid.Similarly, the length (for example, abandoning frame length) that abandons frame is chosen as and is fully greater than any expense duration associated with the power-down operation of audio front end 10.In this respect, according to circumstances, regularly the dutycycle of detection window can be 50%, or certain other value.For example, if power down expense is low with respect to powering up expense, dutycycle may be increased to and be greater than 50% value to increase sample frame length and further optimizing power saving.
Sampled audio can cushion in storer 16, and wherein illustrated voice activity detector 18 determines in sound signal, whether there is speech activity based on sampled audio at least partly.Thereby illustrated voice activity detector 18 can be based on making activity decision-making at the odd number N millisecond frame obtaining during part that enlivens of regular detection window.If speech activity detected, phrase recognizer 20 can determine in sound signal, whether there is the activation phrase setting in advance by analytical sampling audio frequency.
Fig. 2 illustrates start plotting Figure 26 of duration for the speech trigger device accuracy vs.VAD of multiple sample frame size.VAD starts the duration can be corresponding to the size of memory buffer, for example, for according to the storer 16(of the sampled audio that dutycycle obtains as described herein for example storing, and buffering capacity).In illustrated example, mark and draw Figure 26 and prove that it can be receptible (for example,, in 2%) that accuracy declines for the starting the duration of 160 milliseconds of the sample frame size of 40 milliseconds of as many as and as many as.
Turn to now Fig. 3, the method 30 mutual with mobile device of initiating is shown.The method 30 can be embodied as one group of logical order in mobile device, it is stored in for example random-access memory (ram), ROM (read-only memory) (ROM), programming ROM (PROM), firmware, in the machines such as flash memory or computer-readable recording medium, at for example programmable logic array (PLA), field programmable gate array (FPGA), in the configurable logics such as complex programmable logic device (CPLD), using for example special IC (ASIC), in the fixed function logic hardware of the circuit engineerings such as complementary metal oxide semiconductor (CMOS) (CMOS) or transistor-transistor logic (TTL) technology, or its any combination.For example, can write with any combination of one or more programming languages for the computer program code that is implemented in the operation shown in method 30, comprise the conventional sequencing programming languages such as the Object-Oriented Programming Languages such as such as Java, Smalltalk, C++ or analog and for example " C " programming language or similar programming language.
Illustrated processing block 32 is used the audio front end of mobile device to obtain sampled audio from sound signal during the Part I of regular detection window.The power consumption of one or more parts of audio front end can reduce at frame 34 during the Part II of regular detection window, wherein can make about whether there be determining of speech activity in sound signal based on sampled audio at least partly at frame 36.If so, illustrated frame 38 for example continues, to sampled audio signal (, ending dutycycle sampling) to improve the accuracy of phrase testing goal.Otherwise process can repeat until speech activity detected.
Fig. 4 illustrates mobile device 40.This mobile device 40 can be (for example to have computing function, personal digital assistant/PDA, kneetop computer, Intelligent flat computer), communication functionality (for example, intelligent wireless phone), imaging function, media play function (for example, intelligent television/TV) or the part of the platform of its any combination (for example, mobile Internet device/MID).In illustrated example, device 40 comprises the battery 58 and the processor 42 with integrated memory controller (IMC) 44 for electric power is provided to device 40, and this integrated memory controller (IMC) 44 can be communicated by letter with system storage 46.System storage 46 can comprise for example dynamic RAM (DRAM), and it is configured to one or more memory modules, for example dual inline memory module (DIMM), small-sized DIMM(SODIMM), etc.
Illustrated device 40 also comprises input and output (IO) module 48, be sometimes referred to as the south bridge of chipset, its play host apparatus effect and can with audio codec 50 for example, microphone 52, one or more loudspeaker 54 and large capacity storage 56(for example, hard disk drive/HDD, CD, flash memory, etc.) communication.Audio codec 50, microphone 52, IO module 48 etc. can be example audio front end 10(Fig. 1 as already discussed) etc. the part of audio front end.It can play illustrated processor 62(and for example power management module 22(Fig. 1) the similar effect of constant power administration module) can actuating logic 60, it is configured to use audio front end to obtain sampled audio from sound signal during the Part I of regular detection window.This logic 60 also can reduce the power consumption of one or more parts of audio front end during the Part II of regular detection window, and determines in sound signal, whether there is speech activity based on sampled audio at least partly.Logic 60 can be alternatively in the outside realization of processor 42.In addition, processor 42 and IO module 48 can be embodied as system on chip (SoC) jointly on identical semiconductor wafer.
extra attention and example:
Example one can comprise mobile device, and it has for the battery to the power supply of this mobile device, audio front end with for using this audio front end to obtain the logic of sampled audio from sound signal during the Part I of regular detection window.This logic also can reduce the power consumption of one or more parts of audio front end during the Part II of regular detection window, and determines in sound signal, whether there is speech activity based on sampled audio at least partly.
In addition, the mobile device of example one can comprise power management module, and it comprises this logic at least partly.
Example two can comprise such equipment, and it has during the Part I of regular detection window and uses the audio front end of mobile device to obtain the logic of sampled audio from sound signal.This logic also can reduce the power consumption of one or more parts of audio front end during the Part II of regular detection window, and determines in sound signal, whether there is speech activity based on sampled audio at least partly.
In addition, the length of Part I and Part II length will be limited by the dutycycle of the window in example one or two.In addition, Part I is greater than with one or more the first expense duration and Part II that power up operative association of audio front end and is greater than the second expense duration associated with one or more power-down operation of audio front end.In addition, the logic of example one or two necessarily sampling rate sampled audio signal is obtained to sampled audio.In addition, the logic of example one or two can store sampled audio into the storer of audio front end.In addition, if there is speech activity in sound signal, the logic of example one or two is sustainable to sampled audio signal.In addition, in example one or two, can during the Part II of window, reduce the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer.
Example three can comprise nonvolatile computer-readable recording medium, it has instruction set, if instruction is executed by processor, impels mobile device to use the audio front end of mobile device to obtain sampled audio from sound signal during the Part I of regular detection window.Also can impel mobile device to reduce the power consumption of one or more parts of audio front end during the Part II of regular detection window if instruction is performed, and determine in sound signal, whether there is speech activity based on sampled audio at least partly.
In addition, the length of Part I and the length of Part II can be limited by the dutycycle of the window in example three.In addition, the Part I of example three can be greater than and powers up the first expense duration of operative association with audio front end one or more and the Part II of example three can be greater than the second expense duration associated with one or more power-down operation of audio front end.In addition, if the instruction of example three is performed, can impel mobile device, with certain sampling rate, sampled audio signal is obtained to sampled audio.In addition, if the instruction of example three is performed, can impel mobile device sampled audio to be stored into the storer of audio front end.In addition, if there is speech activity in sound signal, if the instruction of example three is performed, can impel mobile device to continue sampled audio signal.In addition, in example three, the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer can be lowered during the Part II of window.
Example four can involve computer implemented method, wherein the audio front end of mobile device for during the Part I of regular detection window from sound signal to audio sample.The method also can provide during the Part II of regular detection window and reduce the power consumption of one or more parts of audio front end, and determines in sound signal, whether there is speech activity based on sampled audio at least partly.
In addition, in the method for example four, the length of Part I and the length of Part II can be limited by the dutycycle of window.In addition, in the method for example four, Part I can be greater than with one or more the first expense duration and Part II that power up operative association of audio front end can be greater than the second expense duration associated with one or more power-down operation of audio front end.In addition, the method for example four can further comprise with certain sampling rate sampled audio signal is obtained to sampled audio.In addition, in the method for example four, the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer can reduce during the Part II of window.
Thereby technology described herein can adopt the mobile device of standby operation to realize longer battery life to detecting for speech trigger.Therefore, hands-free operation for example, is obviously strengthened with under the multiple backgrounds such as the use scenes relevant to deformity in for example vehicle-mounted operation (, larger security).
Embodiment can be applicable to use together with all types of SIC (semiconductor integrated circuit) (" IC ") chip.The example of these IC chips includes but not limited to processor, controller, chipset parts, programmable logic array (PLA), memory chip, network chip/system on chip (SoC), SSD/NAND controller ASIC and analog.In addition, in the drawings some, signal conductor represents with line.Some can different indicate more composition signal path, have digital label indicates many composition signal paths and/or has arrow at one or more ends place and indicate main directions of information flow.But this should not explain in restrictive mode.On the contrary, such additional detail can use so that more easily understand circuit together with one or more example embodiment.The signal wire of any expression, no matter whether there is extra information, in fact can comprise and can in multiple directions, advance and one or more signals that the signaling plan of available any applicable type (numeral or the artificial line for example realized by differential pair, optical fiber cable and/or single ended line) is realized.
Can provide example sizes/models/values/ranges, but embodiments of the invention are not limited to this.When manufacturing technology (for example photoetching) in time and when ripe, expection can be manufactured the equipment with reduced size.In addition, for the purpose of simplifying the description and discuss, and in order not cover some aspect of embodiment, well-known electric power/grounding connection to IC chip and miscellaneous part can or can in figure, not illustrate.In addition, setting can adopt block diagram form to illustrate to avoid covering embodiment, and based on the fact be to depend on and realize embodiment place platform (, such details should completely in those skilled in that art's the visual field) about the details height of the realization of such block diagram setting.Setting forth specific detail (for example, circuit) to describe in the situation of example embodiment, can put into practice embodiment in the case of there is no these specific detail or having the version of these specific detail, this should be obvious to those skilled in that art.It is illustrative and nonrestrictive that thereby this description is regarded as.
Term " coupling " can be used in reference to the relation (directly or indirectly) of any type between the parts of talking about in this article, and applicable to electricity, machinery, fluid, optical, electrical magnetic, electromechanics or other connections.In addition, term " first ", " second " etc. are only discussed for being convenient in this article, and do not have the meaning of special time or time sequencing, unless otherwise noted.
Those skilled in that art can realize the broad range of techniques of recognizing embodiment from description above in a variety of forms.Therefore, although embodiment describes together with its particular example, the true scope of embodiment should be not restricted like this because when research figure, instructions and below claim time other amendments will become obvious to technician.
Background technology
The hands-free operation of mobile device vehicle-mounted operation such as with can be relevant under the multiple backgrounds such as the use scenes relevant with deformity.But, middle initiation mobile device is set can proposes alternately many challenges hands-free.For example, routine techniques scheme can specify the activation phrase that sets in advance (for example, " feed computing machine "), it realizes user interface based on language for further mutual, wherein can be to audio frequency continuous sampling for phrase identifier analysis until activation phrase detected.Such method can increase power consumption and battery life is had to negative effect.
Brief description of the drawings
Claims (24)
1. for initiating a mutual mobile device, it comprises:
Battery, for powering to described mobile device;
Audio front end; And
Logic, for
During the Part I of window, use described audio front end to obtain sampled audio from sound signal;
During the Part II of described window, reduce the power consumption of one or more parts of described audio front end; And
Determine in described sound signal, whether there is speech activity based on sampled audio at least partly.
2. mobile device as claimed in claim 1, the length of wherein said Part I and the length of described Part II are limited by the dutycycle of described window.
3. mobile device as claimed in claim 1, wherein said Part I is greater than one or more the first expense duration that power up operative association with described audio front end, and described Part II is greater than the second expense duration associated with one or more power-down operation of described audio front end.
4. mobile device as claimed in claim 1, wherein said logic is for obtaining sampled audio with certain sampling rate to described sampled audio signal.
5. the mobile device as described in any one in claim 1-4, wherein said audio front end comprises one or more in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer.
6. for initiating a mutual equipment, it comprises:
Logic, for
During the Part I of window, use the audio front end of mobile device to obtain sampled audio from sound signal;
During the Part II of described window, reduce the power consumption of one or more parts of described audio front end; And
Determine in described sound signal, whether there is speech activity based on sampled audio at least partly.
7. equipment as claimed in claim 6, the length of wherein said Part I and the length of described Part II are limited by the dutycycle of described window.
8. equipment as claimed in claim 6, wherein said Part I is greater than one or more the first expense duration that power up operative association with described audio front end, and described Part II is greater than the second expense duration associated with one or more power-down operation of described audio front end.
9. equipment as claimed in claim 6, wherein said logic is for obtaining sampled audio with certain sampling rate to described sampled audio signal.
10. equipment as claimed in claim 6, wherein said logic is for storing described sampled audio into the storer of described audio front end.
11. equipment as claimed in claim 6, if wherein there is speech activity in described sound signal, described logic is continuously to described sampled audio signal.
12. equipment as described in any one in claim 6-11 wherein reduce the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer during the Part II of described window.
13. 1 kinds for initiating mutual mobile device, and it comprises:
For using the audio front end of described mobile device to obtain the parts of sampled audio from sound signal during the Part I of window;
For reduce the parts of the power consumption of one or more parts of described audio front end during the Part II of described window; And
For determining based on sampled audio the parts that whether have speech activity in described sound signal at least partly.
14. mobile devices as claimed in claim 13, the length of wherein said Part I and the length of described Part II are limited by the dutycycle of described window.
15. mobile devices as claimed in claim 13, wherein said Part I is greater than one or more the first expense duration that power up operative association with described audio front end, and described Part II is greater than the second expense duration associated with one or more power-down operation of described audio front end.
16. mobile devices as claimed in claim 13, it further comprises the parts for described sampled audio signal being obtained with certain sampling rate sampled audio.
17. mobile devices as claimed in claim 13, it further comprises the parts for described sampled audio being stored into the storer of described audio front end.
18. mobile devices as claimed in claim 13, if its further comprise for having speech activity in described sound signal; the continuously parts to described sampled audio signal.
19. mobile devices as described in any one in claim 13-18 wherein reduce the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer during the Part II of described window.
20. 1 kinds for initiating mutual computer implemented method, and it comprises:
The audio front end that uses mobile device during the Part I of window from sound signal to audio sample;
During the Part II of described window, reduce the power consumption of one or more parts of audio front end; And
Determine in described sound signal, whether there is speech activity based on sampled audio at least partly.
21. methods as claimed in claim 20, the length of wherein said Part I and the length of described Part II are limited by the dutycycle of described window.
22. methods as claimed in claim 20, wherein said Part I is greater than one or more the first expense duration that power up operative association with described audio front end, and described Part II is greater than the second expense duration associated with one or more power-down operation of described audio front end.
23. methods as claimed in claim 20, it further comprises with certain sampling rate described sampled audio signal is obtained to sampled audio.
24. methods as described in any one in claim 20-23 wherein reduce the one or more power consumption in microphone, voice activity detector, analog to digital converter, storer and phrase recognizer during the Part II of described window.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/841,166 US9270801B2 (en) | 2013-03-15 | 2013-03-15 | Low power audio trigger via intermittent sampling |
| US13/841166 | 2013-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104050973A true CN104050973A (en) | 2014-09-17 |
| CN104050973B CN104050973B (en) | 2017-08-08 |
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| CN201410096722.1A Active CN104050973B (en) | 2013-03-15 | 2014-03-17 | Via the low-power audio trigger of intermittent sampling |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9270801B2 (en) |
| CN (1) | CN104050973B (en) |
| TW (1) | TWI559293B (en) |
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| CN104766609A (en) * | 2014-11-24 | 2015-07-08 | 霍尼韦尔环境自控产品（天津）有限公司 | Voice control device and voice recognition control method thereof |
| CN105931640A (en) * | 2015-02-27 | 2016-09-07 | 想象技术有限公司 | Low Power Detection Of Activation Phrase |
| CN108399915A (en) * | 2017-02-08 | 2018-08-14 | 英特尔公司 | Low-power key phrase detects |
| CN109155888A (en) * | 2016-02-29 | 2019-01-04 | 韦斯伯技术公司 | The piezoelectric MEMS element for detecting the signal of Sound stimulat for generating expression |
| CN109414169A (en) * | 2015-12-22 | 2019-03-01 | 英特尔公司 | Demodulate the signal from intermittent irradiation region |
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| US10332543B1 (en) | 2018-03-12 | 2019-06-25 | Cypress Semiconductor Corporation | Systems and methods for capturing noise for pattern recognition processing |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9270801B2 (en) | 2016-02-23 |
| CN104050973B (en) | 2017-08-08 |
| TWI559293B (en) | 2016-11-21 |
| US20140270197A1 (en) | 2014-09-18 |
| TW201442018A (en) | 2014-11-01 |
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